Since 1977, New Zealand has celebrated Arbor Day on June 5, which is also World Environment Day, prior to then Arbor Day, in New Zealand, was celebrated on August 4 – which is rather late in the year for tree planting in New Zealand hence the date change.

Since the late 1930s alloy steels have been used for frame and fork tubes in higher quality machines.

Since the late 1980s, evidence has become available that instillation of BCG into the bladder is an effective form of immunotherapy in this disease.

Since its introduction at games by the " Roar from 34 ", led by Wild Bill Hagy and others, in the late 1970s, it has been a tradition at Orioles games for fans to yell out the " Oh " in the line " Oh, say does that Star-Spangled Banner yet wave " in " The Star-Spangled Banner ".

Since the late nineteenth century, only two brief periods of violence have marred its democratic development.

Since there is no evidence that late Maastrichtian nonavian dinosaurs could burrow, swim or dive, they were unable to shelter themselves from the worst parts of any environmental stress that occurred at the K – T boundary.

Since the late 1990s, Orange has also been working in conjunction with singer / songwriter Craig Deanto, and they have released an album titled Who Hears the Cries.

Since 2000Actually the most important are: Cable Onda ( 40 % share ), Cable and Wireless ( started on late 2009 ) and CTV.

Since these geographic considerations imply that, not including the hill within, the walls would be willfully making the city prone to attack from it, some scholars, including the late 19th century surveyors of the Palestine Exploration Fund, consider it unlikely that a wall would ever have been built that would cut the hill off from the city in the valley ; archaeological evidence for the existence of an earlier city wall in such a location has never been found.

Since the late 1990s, custom dog tags have become fashionable amongst musicians ( particularly rappers ), and as a marketing giveaway item.

Since the late 1980s, prominent individuals and organizations have recognized the seminal importance of Engelbart's contributions.

Since the late 1990s, Dublin has experienced a significant level of net immigration, with the greatest numbers coming from the European Union, especially the United Kingdom, Poland and Lithuania.

Since the late 19th century, differential geometry has grown into a field concerned more generally with the geometric structures on differentiable manifolds.

Since then McLean has stated that the lyrics are also somewhat autobiographical and present an abstract story of his life from the mid-1950s until the time he wrote the song in the late 1960s.

Since the late 1980s, the field has been revived in the wake of progress made in the related fields of psycholinguistics, neurolinguistics, evolutionary anthropology, evolutionary psychology, and cognitive science.

Since the late ' 60s, the exploitation of oil increased production and reserves are estimated at 4. 036 million barrels

Since its acquisition of Verant in late 1999, SOE develops, runs, and distributes EverQuest.

Since the late 1990s, almost all release prints have used polyester film stock.

Since the late 1990s, bzip2, a file compression utility based on a block-sorting algorithm, has gained some popularity as a gzip replacement.

Since the late 1970s, towns in the north began industrial production through maquiladoras, especially in San Pedro Sula and Puerto Cortés.

Since the late 1980s, Indonesia has made significant changes to its regulatory framework to encourage economic growth.

* interface to personal computers: Since the late 1990s, most pumps can interface with personal computers for managing and documenting pump programming and / or to upload data from the pump.

Since the late 1990s, the Jamaican government has set an agenda to push the development of technology in Jamaica.

Since the late Middle Ages the Kingdoms of England and Scotland had been evolving towards a quasi-oligarchical or collegiate form of government in which the monarch was held to rule with the consensus of the land-owning upper classes.

Since the end of the nineteenth century, Bar-Kochba has been the subject of numerous works of art ( dramas, operas, novels, etc.

Since the early nineteenth century, various different approaches have emerged in the West to theology as an academic discipline.

Since the nineteenth century, the people have been concentrated on a reservation established south of Billings, Montana.

Since the nineteenth century, it has been connected by rail to both of these cities by the Princeton Branch rail line to the nearby Princeton Junction Station on Amtrak's Northeast Corridor.

Since the late nineteenth century, fingerprint identification methods have been used by police agencies around the world to identify suspected criminals as well as the victims of crime.

Since the nineteenth century, many Muslims had aspired to uniting the Muslim ummah to serve their common political, economic, and social interests.

Since the nineteenth century, the beer has been flavoured with ivy so as to discourage excessive consumption.

Since the nineteenth century, the Hall has had close links with the Oxford Inter-Collegiate Christian Union and the Oxford Pastorate, two evangelical organizations working with Oxford students.

Since the advent of modern drainage in the nineteenth and twentieth centuries, the Fens have been radically transformed, so that today arable farming has almost entirely replaced pastoral and the economy of the Fens is heavily invested in the production of crops such as grains, vegetables and some cash crops such as rapeseed or canola.

Since the latter part of the nineteenth century, opera houses generally have an orchestra pit, where a large number of orchestra players may be seated at a level below the audience, so that they can play without overwhelming the singing voices.

Since the late nineteenth century, Pākehā have used many Maori cultural practices when they required something distinctively New Zealand.

Since there was no linguistic contact with France from the late eighteenth century until the twentieth century, Acadian French retained features that died out during the French standardization efforts of the nineteenth century.

Since the nineteenth century, sightings of Black Dogs, Werewolves, British big cats ,, UFOs and even Bigfoot have appeared in the local press.

Since that time, the village has gained only 350 people, but its small size and slow growth has preserved its nineteenth century character.

Since the nineteenth century, early improvements and alterations to the river were for the purposes of navigation.

Since usage of the phrase cannot be shown to date back earlier than the first half of the nineteenth century however a pre-16th century origin seems unlikely.

Since the nineteenth century, suggestions have been made that Timon is the work of two writers, and it has been argued that the play's unusual features are the result of the play's being co-authored by playwrights with very different mentalities ; the most popular candidate, Thomas Middleton, was first suggested in 1920.

Since the nineteenth century, grazing and an increased incidence of fire resulted in a reduction in range condition, and extensive damage to bog communities, from which plant communities have been slow to recover.

Since the beginning of settlement in the mid nineteenth century, British honours were awarded in New Zealand.

Since that time, The Heidelberg School has taken on a wider meaning and covers Australian artists of the late nineteenth century who painted plein-air in the impressionist tradition.

Since then, San Juan de Ulúa would largely serve as a military and political symbol of Mexican resistance to foreign invasions and occupations, several of which took place during the nineteenth century.

Since the nineteenth century, abundant sightseeing and recreational attributes have been the basis of a tourism industry.

Since the early nineteenth century there have been a large number of ornamental cultivars of European Beech made by horticultural selection, often repeatedly ; they include: